Lacon, Illinois
City
5th Street, Lacon, view towards the Illinois River
Location in Marshall County, Illinois
Lacon Location in the United States
Coordinates: 41°1′26″N 89°24′28″W / 41.02389°N 89.40778°W / 41.02389; -89.40778
Country	United States
State	Illinois
County	Marshall
Township	Lacon
Area [1]
• Total	1.64 sq mi (4.25 km2)
• Land	1.60 sq mi (4.14 km2)
• Water	0.04 sq mi (0.11 km2)
Elevation	484 ft (148 m)
Population  (2020)[2]
• Total	1,878
• Density	1,173.75/sq mi (453.14/km2)
Time zone	UTC-6 (CST)
• Summer (DST)	UTC-5 (CDT)
ZIP code	61540
Area code	309
FIPS code	17-40559
Website	laconcity.com

Lacon is a city in Illinois in the United States. It is part of the Peoria, Illinois Metropolitan Statistical Area.

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